COMEDK · Chemistry · 19. Chemical Kinetics
A substance \(X\) decomposes in solution following the first order kinetics. Flask I contains 1 L of 1 M solution of \(X\) and flask II contain 100 mL of 0.6 M solution. After 8 hours, the concentration, of \(X\) in flask I becomes 0.25 M .
The time required for concentration to become 0.3 M in flask II is .........
- A 6 hrs
- B 5 hrs
- C 4 hrs
- D 2 hrs
Answer & Solution
Correct Answer
(C) 4 hrs
Step-by-step Solution
Detailed explanation
Flask I \(\therefore \quad t_{1 / 2}=4 \mathrm{hrs} .\) Flask II A first order reaction is independent of the initial concentration of the reactant. Hence, the time required is 4 hours.
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